【单选题】设随机变量X服从泊松分布,且P{X=1}=P{X=2}, 则P{X=4}=( )
【简答题】Are there any logical fallacies in his argument?
【简答题】Argument may often be a part of it, but the purpose of the argument is not to convince. There is no winning in conversation.
【单选题】设随机变量X服从泊松分布,且P{X=1}=P{X=2},则E(X)=()
【简答题】设随机变量X服从泊松分布,且 3P{X=1}+2P{X=2}=4P{X=0}, 求X的期望与方差。
【多选题】多选题: 2. In order to have an argument ,_______________.
A.
Your reasons should support a conclusion.
B.
There is a relationship between reasons.
C.
You must have a connection between reasons and conclusion.
D.
You must have a perfect conclusion.
【判断题】轴流式脱粒机是谷物轴向喂入,在机内一面做圆周运动,一面又沿轴向运动,茎杆从轴向或切向排出。